What are the differences between the normal and the hard mode?
Solution 1:
I believe the two differences are - Eating Candies does not increase your hp (your hp will be 100 all game) - The sorceress cannot improve your sword level beyond 5 ("A mysterious force has prevented me from upgrading your sword", or some such message).
(A third difference may be an increased sense of satisfaction when you beat the game :). Enjoy! )